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DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Fair Value Hedges (Details)
$ in Millions
Dec. 31, 2024
USD ($)
Long-term borrowings  
Fair Value, Option, Quantitative Disclosures [Line Items]  
Carrying Value of Hedged Items $ 795
Deposits  
Fair Value, Option, Quantitative Disclosures [Line Items]  
Carrying Value of Hedged Items 335
Currently Designated | Long-term borrowings  
Fair Value, Option, Quantitative Disclosures [Line Items]  
Cumulative Fair Value Hedging Adjustment Included in the Carrying Value of Hedged Items 2
Currently Designated | Deposits  
Fair Value, Option, Quantitative Disclosures [Line Items]  
Cumulative Fair Value Hedging Adjustment Included in the Carrying Value of Hedged Items 1
No Longer Designated | Long-term borrowings  
Fair Value, Option, Quantitative Disclosures [Line Items]  
Cumulative Fair Value Hedging Adjustment Included in the Carrying Value of Hedged Items 0
No Longer Designated | Deposits  
Fair Value, Option, Quantitative Disclosures [Line Items]  
Cumulative Fair Value Hedging Adjustment Included in the Carrying Value of Hedged Items $ 0